Balance bike



1 . Balance bike

1.1 is a top, front, and right side perspective view of a balance bike showing my new design;

1.2 is a top, rear, and right side perspective view thereof;

1.3 is a top plan view thereof;

1.4 is a right side elevation view thereof; and

1.5 is a front elevation view thereof.

The broken lines in the drawings illustrate portions of the balance bike that form no part of the claimed design. 

CLAIM The ornamental design for a balance bike, as shown and described. 